k8s系列---EFK日誌系統

時間 2020-07-21

標籤 k8s 系列 efk 日誌系統简体版

原文原文鏈接

文章拷於：http://blog.itpub.net/28916011/viewspace-2216748/ 用於本身備份記錄錯誤html

一個完整的k8s集羣，應該包含以下六大部分：kube-dns、ingress-controller、metrics server監控系統、dashboard、存儲和EFK日誌系統。node

咱們的日誌系統要部署在k8s集羣以外，這樣即便整個k8s集羣宕機了，咱們還能從外置的日誌系統查看到k8s宕機前的日誌。 python

另外，咱們生產部署的日誌系統要單獨放在一個存儲捲上。這裏咱們爲了方便，本次測試關閉了日誌系統的存儲卷功能。docker

一、添加incubator源（這個源是開發版的安裝包，用起來可能不穩定） shell

訪問https://hub.kubeapps.com/chartsjson

[root@master ~]# helm repo list
NAME  URL                                                   
local http://127.0.0.1:8879/charts                          
stablehttps://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts

[root@master efk]# helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com
"incubator" has been added to your repositories

[root@master efk]# helm repo list
NAME     URL                                                       
local    http://127.0.0.1:8879/charts                              
stable   https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts    
incubatorhttps://kubernetes-charts-incubator.storage.googleapis.com

二、下載elasticsearch vim

[root@master efk]# helm fetch incubator/elasticsearch
[root@master efk]# ls
elasticsearch-1.10.2.tgz
[root@master efk]# tar -xvf elasticsearch-1.10.2.tgz

三、關閉存儲卷（生產上不要關，咱們這裏爲了測試方便才關的）api

[root@master efk]# vim elasticsearch/values.yaml 
把
 persistence:
    enabled: true
改爲
 persistence:
    enabled: false
有兩處須要改

上面咱們關閉了存儲卷的功能，而改用本地目錄來存儲日誌。瀏覽器

四、建立單獨的名稱空間 bash

[root@master efk]# kubectl   create namespace efk
namespace/logs created

[root@master efk]# kubectl get ns
NAME               STATUS    AGE
ekf               Active    13s

五、把elasticsearch安裝在efk名稱空間中，我沒用這個方式，用的下面的

[root@master efk]# helm install --name els1 --namespace=efk -f elasticsearch/values.yaml incubator/elasticsearch
NAME:   els1
LAST DEPLOYED: Thu Oct 18 01:59:15 2018
NAMESPACE: efk
STATUS: DEPLOYED
RESOURCES:
==> v1/Pod(related)
NAME                                        READY  STATUS   RESTARTS  AGE
els1-elasticsearch-client-58899f6794-gxn7x  0/1    Pending  0         0s
els1-elasticsearch-client-58899f6794-mmqq6  0/1    Pending  0         0s
els1-elasticsearch-data-0                   0/1    Pending  0         0s
els1-elasticsearch-master-0                 0/1    Pending  0         0s
==> v1/ConfigMap
NAME                DATA  AGE
els1-elasticsearch  4     1s
==> v1/Service
NAME                          TYPE       CLUSTER-IP      EXTERNAL-IP  PORT(S)   AGE
els1-elasticsearch-client     ClusterIP  10.103.147.142  <none>       9200/TCP  0s
els1-elasticsearch-discovery  ClusterIP  None            <none>       9300/TCP  0s
==> v1beta1/Deployment
NAME                       DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
els1-elasticsearch-client  2        0        0           0          0s
==> v1beta1/StatefulSet
NAME                       DESIRED  CURRENT  AGE
els1-elasticsearch-data    2        1        0s
els1-elasticsearch-master  3        1        0s
NOTES:
The elasticsearch cluster has been installed.
***
Please note that this chart has been deprecated and moved to stable.
Going forward please use the stable version of this chart.
***
Elasticsearch can be accessed:
  * Within your cluster, at the following DNS name at port 9200:
    els1-elasticsearch-client.efk.svc
  * From outside the cluster, run these commands in the same shell:
    export POD_NAME=$(kubectl get pods --namespace efk -l "app=elasticsearch,component=client,release=els1" -o jsonpath="{.items[0].metadata.name}")
    echo "Visit http://127.0.0.1:9200 to use Elasticsearch"
    kubectl port-forward --namespace efk $POD_NAME 9200:9200

說明：--name els1是chart部署後的release名字，名字本身隨便取就行。

上面咱們是經過values.yaml文件在線安裝的els。可是咱們已經下載els安裝包了，也能夠經過下載的els包進行離線安裝，以下：

[root@master efk]# ls
elasticsearch  elasticsearch-1.10.2.tgz

root@master efk]# helm  install --name els1 --namespace=efk ./elasticsearch

說明：./elasticsearch就是當前els安裝包目錄的名字。

安裝完後，咱們就能在efk名稱空間中看到相應的pods資源了（我在安裝elasticsearch時，當時是安裝不上的，由於說是打不開elasticseartch的官網，也就是不能再這個官網下載鏡像，後來我就放置了兩天沒管，再登陸上看，發現鏡像居然本身下載好了，真是有意思）我是第一次沒安裝成，機器內存小了，而後又加的內存。刪掉了這個namespace次日又從新建的，而後一次成功了。

故障二： els1-...client 出現了READY 0/1的狀態，describe發現健康檢查沒經過，進到pod裏去ping其餘node的pod發現ping不通了，其餘pod也是這種狀況，不一樣node之間的pod是不通的，ip route show 有問題，參照flannel那一章。很奇葩，沒找到問題，flannel是正常的。但就是不通。刪了flannel又從新搞了一次flannel 最後就行了

[root@master efk]#  kubectl get pods -n efk -o wide
NAME                                         READY     STATUS    RESTARTS   AGE       IP             NODE
els1-elasticsearch-client-78b54979c5-kzj7z   1/1       Running   2          1h        10.244.2.157   node2
els1-elasticsearch-client-78b54979c5-xn2gb   1/1       Running   1          1h        10.244.2.151   node2
els1-elasticsearch-data-0                    1/1       Running   0          1h        10.244.1.165   node1
els1-elasticsearch-data-1                    1/1       Running   0          1h        10.244.2.169   node2
els1-elasticsearch-master-0                  1/1       Running   0          1h        10.244.1.163   node1
els1-elasticsearch-master-1                  1/1       Running   0          1h        10.244.2.168   node2
els1-elasticsearch-master-2                  1/1       Running   0          57m       10.244.1.170   node1

查看安裝好的release：

[root@master efk]# helm list
NAME  REVISIONUPDATED                 STATUS  CHART               NAMESPACE
els1  1       Thu Oct 18 23:11:54 2018DEPLOYEDelasticsearch-1.10.2efk

查看els1的狀態：

[root@k8s-master1 ~]# helm status els1
  * Within your cluster, at the following DNS name at port 9200:
    els1-elasticsearch-client.efk.svc  ##這個就是els1 service的主機名
  * From outside the cluster, run these commands in the same shell:
    export POD_NAME=$(kubectl get pods --namespace efk -l "app=elasticsearch,component=client,release=els1" -o jsonpath="{.items[0].metadata.name}")
    echo "Visit http://127.0.0.1:9200 to use Elasticsearch"
    kubectl port-forward --namespace efk $POD_NAME 9200:9200

cirror是專門爲測試虛擬環境的客戶端，它能夠快速建立一個kvm的虛擬機，一共才幾兆的大小，並且裏面提供的工具仍是比較完整的。

下面咱們運行cirror：

[root@k8s-master1 ~]# kubectl run cirror-$RANDOM --rm -it --image=cirros -- /bin/sh
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
If you don't see a command prompt, try pressing enter.
/ #
/ # nslookup els1-elasticsearch-client.efk.svc
Server:    10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name:      els1-elasticsearch-client.efk.svc
Address 1: 10.103.105.170 els1-elasticsearch-client.efk.svc.cluster.local

由於我刪除namespace後出現了其餘問題，最後重啓了集羣，沒想到flannel又雞巴的出問題了，routing模式又沒了，而後nslookup一直出問題，我還覺得個人版本又出了問題，最後刪了flannel又從新生成

-rm：表示退出咱們就直接刪除掉

-it：表示交互式登陸

上面咱們看到els1-elasticsearch-client.efk.svc服務名解析出來的ip地址。

下面咱們再訪問http:els1-elasticsearch-client.efk.svc:9200 頁面：

/ # curl els1-elasticsearch-client.efk.svc:9200
curl: (6) Couldn't resolve host 'els1-elasticsearch-client.efk.svc'
/ # 
/ # curl els1-elasticsearch-client.efk.svc.cluster.local:9200
{
  "name" : "els1-elasticsearch-client-b898c9d47-5gwzq",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "RFiD2ZGWSAqM2dF6wy24Vw",
  "version" : {
    "number" : "6.4.2",
    "build_flavor" : "oss",
    "build_type" : "tar",
    "build_hash" : "04711c2",
    "build_date" : "2018-09-26T13:34:09.098244Z",
    "build_snapshot" : false,
    "lucene_version" : "7.4.0",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

看裏面的內容：

/ # curl els1-elasticsearch-client.efk.svc.cluster.local:9200/_cat
=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates

看有幾個節點：

/ # curl els1-elasticsearch-client.efk.svc.cluster.local:9200/_cat/nodes
10.244.2.104 23 95 0 0.00 0.02 0.05 di - els1-elasticsearch-data-0
10.244.4.83  42 99 1 0.01 0.11 0.13 mi * els1-elasticsearch-master-1
10.244.4.81  35 99 1 0.01 0.11 0.13 i  - els1-elasticsearch-client-b898c9d47-5gwzq
10.244.4.84  31 99 1 0.01 0.11 0.13 mi - els1-elasticsearch-master-2
10.244.2.105 35 95 0 0.00 0.02 0.05 i  - els1-elasticsearch-client-b898c9d47-shqd2
10.244.4.85  18 99 1 0.01 0.11 0.13 di - els1-elasticsearch-data-1
10.244.4.82  40 99 1 0.01 0.11 0.13 mi - els1-elasticsearch-master-0

六、把fluentd安裝在efk空間中

[root@k8s-master1 ~]# helm fetch  incubator/fluentd-elasticsearch

[root@k8s-master1 ~]# tar -xvf fluentd-elasticsearch-0.7.2.tgz

[root@k8s-master1 ~]# cd fluentd-elasticsearch

[root@k8s-master1 fluentd-elasticsearch]# vim values.yaml 
一、改其中的host: 'elasticsearch-client'，改爲host: 'els1-elasticsearch-client.efk.svc.cluster.local'表示到哪找咱們的elasticsearch服務。
二、改tolerations污點，表示讓k8s master也能接受部署fluentd pod，這樣才能收集主節點的日誌：
把
tolerations: {}
  # - key: node-role.kubernetes.io/master
  #   operator: Exists
  #   effect: NoSchedule
改爲
tolerations: 
  - key: node-role.kubernetes.io/master
    operator: Exists
    effect: NoSchedule
三、改annotations，這樣也就能收集監控prometheus的日誌了
把
annotations: {}
  # prometheus.io/scrape: "true"
  # prometheus.io/port: "24231"
大概就這個位置個人annotations下面是PodAnnktation的位置，底下改的。改爲
annotations:
 prometheus.io/scrape: "true" prometheus.io/port: "24231"
同時把
service: {}
  # type: ClusterIP
  # ports:
  #   - name: "monitor-agent"
  #     port: 24231
改爲
service: 
  type: ClusterIP
  ports:
    - name: "monitor-agent"
    port: 24231
  這樣經過service 24231找監控prometheus的fluentd

開始安裝fluentd：

[root@k8s-master1 fluentd-elasticsearch]# helm install --name fluentd1 --namespace=efk -f values.yaml  ./

[root@k8s-master1 fluentd-elasticsearch]# helm list
NAME    REVISIONUPDATED                 STATUS  CHART                      NAMESPACE
els1    1       Sun Nov  4 09:37:35 2018DEPLOYEDelasticsearch-1.10.2       efk      
fluentd11       Tue Nov  6 09:28:42 2018DEPLOYEDfluentd-elasticsearch-0.7.2efk

[root@k8s-master1 fluentd-elasticsearch]# kubectl get pods -n efk
NAME                                        READY   STATUS             RESTARTS   AGE
els1-elasticsearch-client-b898c9d47-5gwzq   1/1     Running            0          47h
els1-elasticsearch-client-b898c9d47-shqd2   1/1     Running            0          47h
els1-elasticsearch-data-0                   1/1     Running            0          47h
els1-elasticsearch-data-1                   1/1     Running            0          45h
els1-elasticsearch-master-0                 1/1     Running            0          47h
els1-elasticsearch-master-1                 1/1     Running            0          45h
els1-elasticsearch-master-2                 1/1     Running            0          45h
fluentd1-fluentd-elasticsearch-9k456        1/1     Running           0          2m28s
fluentd1-fluentd-elasticsearch-dcnsc        1/1     Running           0          2m28s
    fluentd1-fluentd-elasticsearch-p5h88        1/1   Running           0          2m28s
fluentd1-fluentd-elasticsearch-sdvn9        1/1     Running           0          2m28s
fluentd1-fluentd-elasticsearch-ztm9s        1/1     Running           0          2m28s

七、把kibanna安裝在efk空間中

注意，安裝kibana的版本號必定要和elasticsearch的版本號一致，不然兩者沒法結合起來。我剛開始沒在乎，後面看日誌發現的確有這個問題的存在，而後把kibanna的value.yaml改爲了和es一致的版本，兩個版本能夠從value裏看到

[root@k8s-master1 ~]# helm fetch stable/kibana
[root@k8s-master1 ~]# ls
 kibana-0.2.2.tgz

[root@k8s-master1 ~]# tar -xvf kibana-0.2.2.tgz  
[root@k8s-master1 ~]# cd kibana

修改ELASTICSEARCH_URL，把type改爲NodePort類型

[root@master kibana]# cat values.yaml |more
image:
  repository: "docker.elastic.co/kibana/kibana-oss"
  tag: "6.4.2"
  pullPolicy: "IfNotPresent"

env:
  # All Kibana configuration options are adjustable via env vars.
  # To adjust a config option to an env var uppercase + replace `.` with `_`
  # Ref: https://www.elastic.co/guide/en/kibana/current/settings.html
  #
  ELASTICSEARCH_URL: http://els1-elasticsearch-client.efk.svc:9200
  #SERVER_PORT: 9200
  # LOGGING_VERBOSE: "true"
  # SERVER_DEFAULTROUTE: "/app/kibana"

service:
  type: NodePort
  externalPort: 443
  internalPort: 5601
  ## External IP addresses of service
  ## Default: nil
  ##
  # externalIPs:
  # - 192.168.0.1

開始部署kibana：

[root@k8s-master1 kibana]# helm install --name=kib1 --namespace=efk -f values.yaml ./
==> v1/Service
NAME         TYPE      CLUSTER-IP    EXTERNAL-IP  PORT(S)        AGE
kib1-kibana  NodePort  10.108.188.4  <none>       443:31865/TCP  0s

[root@k8s-master1 kibana]# kubectl get svc -n efk
NAME                           TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)         AGE
els1-elasticsearch-client      ClusterIP   10.103.105.170   <none>        9200/TCP        2d22h
els1-elasticsearch-discovery   ClusterIP   None             <none>        9300/TCP        2d22h
kib1-kibana                    NodePort    10.108.188.4     <none>        443:31865/TCP   4m27s

[root@k8s-master1 kibana]# kubectl get pods -n efk 
NAME                                        READY   STATUS              RESTARTS   AGE
els1-elasticsearch-client-b898c9d47-5gwzq   1/1     Running             0          2d22h
els1-elasticsearch-client-b898c9d47-shqd2   1/1     Running             0          2d22h
els1-elasticsearch-data-0                   1/1     Running             0          22h
els1-elasticsearch-data-1                   1/1     Running             0          22h
els1-elasticsearch-master-0                 1/1     Running             0          2d22h
els1-elasticsearch-master-1                 1/1     Running             0          2d19h
els1-elasticsearch-master-2                 1/1     Running             0          2d19h
fluentd1-fluentd-elasticsearch-9k456        1/1     Running             0          22h
fluentd1-fluentd-elasticsearch-dcnsc        1/1     Running             0          22h
fluentd1-fluentd-elasticsearch-p5h88        1/1     Running             0          22h
fluentd1-fluentd-elasticsearch-sdvn9        1/1     Running             0          22h
fluentd1-fluentd-elasticsearch-ztm9s        1/1     Running             0          22h
kib1-kibana-68f9fbfd84-pt2dt                0/1     Running   0          9m59s #這個鏡像若是下載不下來，多等幾天就下載下來了，我是一下就下載下來了

而後找個瀏覽器，打開宿主機ip:nodeport

https://172.16.22.201:31865

不過我這個打開的頁面有錯誤，作以下操做便可：我那個時候也有錯，有時能刪掉，有時刪也刪不掉，就沒管他，最後登陸正常

[root@k8s-master1 ~]# kubectl get pods -n efk |grep ela
els1-elasticsearch-client-b898c9d47-8pntr   1/1     Running   1          43h
els1-elasticsearch-client-b898c9d47-shqd2   1/1     Running   1          5d13h
els1-elasticsearch-data-0                   1/1     Running   0          117m
els1-elasticsearch-data-1                   1/1     Running   0          109m
els1-elasticsearch-master-0                 1/1     Running   1          2d11h
els1-elasticsearch-master-1                 1/1     Running   0          14h
els1-elasticsearch-master-2                 1/1     Running   0          14h
[root@k8s-master1 ~]# kubectl exec -it els1-elasticsearch-client-b898c9d47-shqd2  -n efk -- /bin/bash 
刪除elasticsearch下的.kibana便可
[root@els1-elasticsearch-client-b898c9d47-shqd2 elasticsearch]#  curl -XDELETE http://els1-elasticsearch-client.efk.svc:9200/.kibana

最終，看到咱們作出了EFK的日誌收集系統

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